One of the big benefits of alowing the plugs to sit on the surface is that they encourage beneficial bacteria growth and micro-organisms. I do not know it this is reduced by breaking down the plugs machanicall y with a power rake.

I have always been under the training that fall is the best time. Pre-emergents do enough to the roots so why aerate and stress the roots out any further? But I did get my Turf Magazine in and the cover article was about spring Aerations, maybe I'll actually read it instead of just looking at the pictures

__________________Why do people not respect us as they do other tradesmen? Because every Tom, Dick, and Harry doesn't think he can be a plumber or electrician!